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Oncostatin M
A G Bruce1, P S Linsley, T M Rose
1Bristol-Myers Squibb, Pharmaceutical Research Institute-Seattle, WA 98121.
Abstract:
Oncostatin M (OSM) was initially identified as a polypeptide cytokine which inhibited the in vitro growth of cells from melanoma and other solid tumors. OSM shows significant similarities in primary amino acid sequence and predicted secondary structure to leukemia inhibitory factor (LIF), ciliary neurotrophic factor (CNTF), granulocyte colony-stimulating factor (G-CSF), interleukin 6 (IL-6), and interleukin 11 (IL-11). Analysis of the genes encoding these proteins reveals a shared exon organization suggesting evolutionary descent from a common ancestral gene. Recent data indicates that OSM also shares a number of in vitro activities with other members of this cytokine family. The overlapping biological effects appear to be explained by the sharing of receptor subunits.
Insights
Oncostatin M (OSM), a cytokine, inhibits tumor cell growth. Its similarities to other cytokines suggest shared evolutionary origins and receptor subunits, explaining overlapping biological effects.
Area of Science:
- Biochemistry
- Molecular Biology
- Immunology
Background:
- Oncostatin M (OSM) is a polypeptide cytokine initially identified for its ability to inhibit the in vitro growth of melanoma and solid tumor cells.
- OSM shares significant sequence and structural similarities with leukemia inhibitory factor (LIF), ciliary neurotrophic factor (CNTF), granulocyte colony-stimulating factor (G-CSF), interleukin 6 (IL-6), and interleukin 11 (IL-11).
Purpose of the Study:
- To investigate the evolutionary relationships of OSM with other related cytokines.
- To understand the molecular basis for the overlapping biological activities observed among OSM and its related cytokine family members.
Main Methods:
- Comparative analysis of amino acid sequences and predicted secondary structures of OSM and related cytokines.
- Examination of gene organization and exon structure for evolutionary insights.
- Review of existing literature on the in vitro activities and receptor interactions of OSM and related cytokines.
Main Results:
- OSM exhibits substantial similarities in primary amino acid sequence and predicted secondary structure to LIF, CNTF, G-CSF, IL-6, and IL-11.
- Analysis of gene structures reveals a shared exon organization, indicating a common ancestral gene for these cytokines.
- OSM shares several in vitro activities with other members of this cytokine family.
Conclusions:
- The shared exon organization suggests that OSM and related cytokines evolved from a common ancestral gene.
- The overlapping biological effects of OSM and related cytokines can be attributed to the sharing of common receptor subunits.